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Homework 3

# Homework 3 - homework 03 ALIBHAI ZAHID Latest unpenalized...

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homework 03 – ALIBHAI, ZAHID 1 Latest unpenalized work: Feb 5 2007 Monday 04:00 (after this date you can not make a perfect score). Work cutoff: Feb 7 2007, 4:00 am. Question 1 part 1 of 1 10 points A ball rolling up a hill has vector velocities vectorv 1 and vectorv 2 at times t 1 and t 2 , respectively, as shown in the figure. v 1 initial v 2 final Which vector diagram below most accu- rately depicts the direction of the ball’s aver- age acceleration over the interval? 1. 2. 3. 4. 5. 6. 7. 8. 9. Zero vector. Question 2 part 1 of 2 10 points A truck driver attempting to deliver some furniture travels 6 km east, turns around and travels 2 km west, and then travels 11 km east to his destination. a) What distance has the driver traveled? Answer in units of km. Question 3 part 2 of 2 10 points b) What is the magnitude of the driver’s total displacement? Answer in units of km. Question 4 part 1 of 2 10 points A commuter airplane starts from an airport and takes the route shown in the figure. It first flies to city A located at 191 km in a direction 28 north of east. Next, it flies 154 km 17 west of north to city B . Finally, it flies 155 km due west to city C .

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homework 03 – ALIBHAI, ZAHID 2 191 km 28 A 154 km 17 B 155 km C R x (km) y (km) 50 100 150 200 50 100 150 200 250 W E S N How far away from the starting point is city C ? Answer in units of km. Question 5 part 2 of 2 10 points What is the direction of the final position vector r , measured from North? Use coun- terclockwise as the positive angular direction, between the limits of - 180 and +180 . Answer in units of . Question 6 part 1 of 1 10 points A particle undergoes two displacements. The first has a magnitude of 11 m and makes an angle of 73 with the positive x axis. The result after the two displacements is 9 . 5 m directed at an angle of 106 to the positive x axis using counter-clockwise as the positive angular direction (see the figure be- low).
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Homework 3 - homework 03 ALIBHAI ZAHID Latest unpenalized...

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